Zhihong Li, Xiufeng Yang, Xin Guo, Q. Peng, Chao Lu, P. Shum, T. Cheng
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A Novel Dual-Band Fiber Bragg Grating with Enhanced Side-Lobe Suppression Ratio by Using Triple Exposure Technique
A simple method was demonstrated to realize single/multi channel dual reflection peak fiber Bragg grating. By using novel triple exposure technique, the side-lobe suppression ratio of the grating pair in each channel increased to 15 dB with peak spacings of 0.25 nm.